These tactical throat mics are available at EB Airsoft for a good price of US$32.22 and you can select between black and tan colours. This set has a transparent voice tube, can fit all Z Tactical PTTs though there's no indication if there are options for certain types of radios that airsofters usually use. This set has a single earphone and both the earphone and mic are waterproof.

Good for SWAT impressions or those who feel comfortable of the throat mic at their throats without feeling being choked. Price includes free shipping and you can check with them if they can have adapters for certain radio units.